def nop(age):
    if age >= 18:
        pass


import math


def move(x, y, step, angle=0):
    nx = x + step * math.cos(angle)
    ny = y - step * math.sin(angle)
    return nx, ny


def quadratic(a,b,c):

    x = (-b+math.sqrt(b*b-4*a*c))/(2*a)

    y = (-b-math.sqrt(b*b-4*a*c))/(2*a)
    return  x,y

x = quadratic(2,3,1)
y = quadratic(1,2,1)
z = quadratic(1,-2,1)
print(x)
print(y)
print(z)